Discussion Intel current and future Lakes & Rapids thread

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Geddagod

Golden Member
Dec 28, 2021
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not totally unexpected. ~2.5 years before launch is when Intel says 1rst customer communication begins.
 

coercitiv

Diamond Member
Jan 24, 2014
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Turns out Sapphire Rapids was cheating a bit for a while, luckily Emerald Rapids is a fair player:
SPEC says it will no longer be publishing SPEC CPU 2017 results for Intel CPUs running a specific version of the Intel compiler, citing displeasure over an apparent targeted optimization for a specific workload (via ServeTheHome and Phoronix) that essentially amounts to cheating. A note has been added to the more than 2,600 benchmark results published with the offending compiler, effectively invalidating those results, mostly from machines running 4th Gen Xeon Sapphire Rapids CPUs.
According to Phoronix, the optimization could boost performance in SPECint by 9% overall. The publication also notes that versions 2022.0 to 2023.0 of the Intel oneAPI Compiler are impacted, meaning most of the now-invalidated results were run in 2022, largely on Sapphire Rapids CPUs.
Results for fifth-gen Xeon Emerald Rapids CPUs are very unlikely to have been running a version of the compiler with the banned optimization since Emerald Rapids came out after the good versions of the compiler were available.
 

AMDK11

Senior member
Jul 15, 2019
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The first clearer photos of the wafer with GraniteRapids chips on Intel 3.

You can see 33 cores (RedwoodCove) per chip.
4 rows of 7 cores and 1 row of 5 cores.
 
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AMDK11

Senior member
Jul 15, 2019
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It's Emerald Rapids, as many pointed out below his Tweet. He corrected it now.
Thanks! Now I checked and remembered what the EmeraldRapids tile looks like and it is actually not GraniteRapids. Unfortunately, the news on Techpowerup still says it is GraniteRapids.
 

Markfw

Moderator Emeritus, Elite Member
May 16, 2002
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32 cores per compute tile for a total of 384 with only 288 active.
Those are E-cores, correct (essentially) If so, it does not stand a chance against Bergamo, let alone the Zen5 equivalent.
 

DavidC1

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Dec 29, 2023
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Those are E-cores, correct (essentially) If so, it does not stand a chance against Bergamo, let alone the Zen5 equivalent.
Never talked about competition, but apparently you are threatened by any mention of a "superior" Intel part like it's your own child's business.
 

Markfw

Moderator Emeritus, Elite Member
May 16, 2002
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Never talked about competition, but apparently you are threatened by any mention of a "superior" Intel part like it's your own child's business.
I am just sick of people defending E-cores against AMD C cores, there is a big difference. So, we will just see when they are available what the competition is and which is superior.
 

dullard

Elite Member
May 21, 2001
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I am just sick of people defending E-cores
I am sorry that you are sick of it and yet I still will comment. But, I think there is a fundamental point that keeps getting missed. Intel E-cores (when compared to Intel P-cores) perform their best in low power per core situations. The E-cores perform terribly in higher power per core situations. What power level will each core in Clearwater Forest have? Roughly 1 W to 2 W each (give or take depending on model)? Now look at E-core vs P-core performance near that 1 W to 2 W power per core:
1708703526340.png

Yes, you are correct that E-cores have been over-defended and often over-hyped. But large core count situations is where E-cores really can shine. If AVX-512 is needed, the E-cores are the wrong way to go. But, otherwise I don't think you can compare what you think of high power per E-core performance to what will happen at low power per E-core. In other words, forget whatever you think you know about E-cores until these chips come out.
 
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